Laboratory Investigation of Mixing Hot-Mix Asphalt with Reclaimed Asphalt Pavement

By Baoshan Huang, Guoqiang Li, Dragana Vukosavljević, X. Shu, B. Egan. 2005

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Reclaimed Asphalt Pavement and Recycled Concrete Aggregate Blends in Pavement Subbases: Laboratory and Field Evaluation (2014, background): “F or p er so na l u se o nl y; a ll ri gh ts r es er ve d. Ac ce pte d M an us cri pt No t C op ye dit ed 4 Currently RAP is predominantly reused in hot mix asphalt production as an aggregate (Huang et al., 2005, Carter and Stroup-Gardiner, 2007).”
Laboratory evaluation of moisture susceptibility of foamed warm mix asphalt containing high percentages of RAP (2012, methodology): “[14] showed through staged extraction method that only a small amount of aged asphalt in RAP can be blended with virgin asphalt and most of aged asphalt forms a stiffer layer coating RAP aggregate particles, which results in a layered structure for RAP-containing asphalt mixtures.”
Influence of Six Rejuvenators on the Performance Properties of Reclaimed Asphalt Pavement (RAP) Binder and 100% Recycled Asphalt Mixtures (2014, background): “Many research results have shown that in reality the blending is somewhere between full and no blending at all [10,23,24,11].”
First Observation of Blending-Zone Morphology at Interface of Reclaimed Asphalt Binder and Virgin Bitumen (2013, background): “These two extreme assumptions can eventually lead to the wrong estimation of design parameters (12,13,14).”